2188886449 has 4 divisors (see below), whose sum is σ = 2221556464. Its totient is φ = 2156216436.

The previous prime is 2188886429. The next prime is 2188886461. The reversal of 2188886449 is 9446888812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2188886449 - 2¹³ = 2188878257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2188886393 and 2188886402.

It is not an unprimeable number, because it can be changed into a prime (2188886419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16334907 + ... + 16335040.

It is an arithmetic number, because the mean of its divisors is an integer number (555389116).

Almost surely, 2^2188886449 is an apocalyptic number.

It is an amenable number.

2188886449 is a deficient number, since it is larger than the sum of its proper divisors (32670015).

2188886449 is an equidigital number, since it uses as much as digits as its factorization.

2188886449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32670014.

The product of its digits is 7077888, while the sum is 58.

The square root of 2188886449 is about 46785.5367501539. The cubic root of 2188886449 is about 1298.3977200472.

The spelling of 2188886449 in words is "two billion, one hundred eighty-eight million, eight hundred eighty-six thousand, four hundred forty-nine".